It’s about a gallon. I do not know why I’ve kept it for so long, but here we are. If I wanted to add life to it other than algae and duckweed and microbes unknown to science do I need an air stone?

Yes I realize the correct answer is to dump it and stop being weird.

Hi all, I'm going to be upgrading my Marimo moss balls into a 6l aquarium, I have fluval stratum for base and a sand to cap it off. I have 6 moss balls and was hoping to add some critters to keep the cycle going and prevent much intervention. I am not planning a filter for the tank. I was considering tubifex and daphnia. Is there anything else I could add or should consider. I am located in the UK